uvm_fault(0xfffffd805deea210, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff816cfc48 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c45dc60 gsbase 0xffff8000299fdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff816cfc48 Starting stack trace... panic(ffffffff833a0373) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c45dbb0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,1,2000,ffff80002a280038) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a280038) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c45dd60) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800d20ce78,1,fffffd80097fb888,ffff80002a280038) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b898180,ffff80002a280038) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b898180,ffff80002a280038) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b898180,ffff80002a280038) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b898180,ffff80002a280038) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a280038) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a280038,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a280038,ffff80003c45e0d0,ffff80003c45e020) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c45e0d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45e0d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x725f517266e0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *393859 91870 0 0 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79bb508513b0, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd805deea210, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79bb508513b0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c439cd0 rbx 0 rdx 0 rcx 0xffff8000fffea020 rax 0x2a r8 0xffff80003c439c00 r9 0x1 r10 0x1e59ed0c653d049b r11 0x4af8d643de67a4e0 r12 0 r13 0xffffffff829480d8 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff818934c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c439c50 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=393859 pid=91870 tcnt=3 stat=onproc flags process=0 proc=0 runpri=82, usrpri=83, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffeba10,0xffff8000fffea2c8 process=0xffff8000ffff61b8 user=0xffff80003c434000, vmspace=0xfffffd800b0273d0 estcpu=33, cpticks=6, pctcpu=0.0, user=3, sys=2, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8957 87682 87030 0 3 0x100082 sysctllk sh *91870 393859 40900 0 7 0 syz-executor 91870 122326 40900 0 3 0x4000000 biowait syz-executor 91870 344601 40900 0 2 0x4000c00 syz-executor 87030 141392 76628 0 3 0x82 wait syz-executor 80438 326474 76628 0 2 0x2 syz-executor 40900 64718 76628 0 3 0x82 nanoslp syz-executor 36835 154707 76628 0 3 0x82 nanoslp syz-executor 79052 324768 1 0 3 0x100083 ttyin getty 70005 504038 76628 0 3 0x82 piperd syz-executor 46537 441613 0 0 3 0x14200 bored sosplice 89818 408283 76628 0 3 0x82 nanoslp syz-executor 12961 162340 76628 0 3 0x82 piperd syz-executor 76628 264653 34936 0 3 0x82 wait syz-executor 34936 454405 91730 0 3 0x10008a sigsusp ksh 91730 283936 54365 0 3 0x98 kqread sshd-session 54365 13829 74943 0 3 0x92 kqread sshd-session 74943 184148 1 0 3 0x88 kqread sshd 5684 151992 27958 74 3 0x1100092 bpf pflogd 27958 494159 1 0 3 0x80 sbwait pflogd 79794 79608 55648 73 3 0x1100090 kqread syslogd 55648 506143 1 0 3 0x100082 sbwait syslogd 51611 425973 1 0 3 0x100080 kqread resolvd 37063 124497 30806 77 3 0x100092 kqread dhcpleased 57850 10189 30806 77 3 0x100092 kqread dhcpleased 30806 10356 1 0 3 0x80 kqread dhcpleased 11259 404006 0 0 3 0x14200 bored smr 12558 420256 0 0 2 0x14200 zerothread 69877 479882 0 0 3 0x14200 aiodoned aiodoned 70705 198210 0 0 3 0x14200 syncer update 40700 260277 0 0 3 0x14200 cleaner cleaner 90622 488253 0 0 3 0x14200 reaper reaper 11612 325899 0 0 3 0x14200 pgdaemon pagedaemon 75785 429007 0 0 3 0x14200 bored viomb 9305 460845 0 0 3 0x40014200 acpi0 acpi0 97378 323173 0 0 3 0x40014200 idle1 42568 345156 0 0 3 0x14200 bored softnet1 18235 511648 0 0 3 0x14200 bored softnet0 86426 286254 0 0 2 0x40014200 systqmp 20616 520624 0 0 3 0x14200 bored systq 10768 100474 0 0 3 0x14200 tmoslp softclockmp 34967 53354 0 0 3 0x40014200 tmoslp softclock 95604 432352 0 0 3 0x40014200 idle0 1 477224 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff838f2f20) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvm_pmr_freepages+0x1a8 sys/uvm/uvm_pmemrange.c:-1 #4 uvm_anfree_list+0x1e5 sys/uvm/uvm_anon.c:129 #5 amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1 #6 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #7 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 #8 exit1+0x6fc sys/kern/kern_exit.c:260 #9 sys_exit+0x1a sys/kern/kern_exit.c:-1 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #11 Xsyscall+0x128 Process 91870 (syz-executor) thread 0xffff8000fffea2b8 (122326) exclusive rrwlock inode r = 0 (0xfffffd800d207c90) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 Process 91870 (syz-executor) thread 0xffff8000fffeb4e0 (344601) exclusive rwlock sysctllk r = 0 (0xffffffff837d7af8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:191 #3 sys_sysctl+0x371 sys/kern/kern_sysctl.c:301 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #5 Xsyscall+0x128 Process 80438 (syz-executor) thread 0xffff8000fffea550 (326474) exclusive rrwlock inode r = 0 (0xfffffd807a3016c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e10db08) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10235 11084K 11261K 166960K 12978 0 pcb 17 16K 18K 166960K 266 0 rtable 190 8K 10K 166960K 1394 0 pf 35 17K 67485K 166960K 289 0 ifaddr 37 7K 7K 166960K 244 0 ifgroup 51 2K 2K 166960K 335 0 sysctl 4 1K 9K 166960K 16 0 counters 66 36K 38K 166960K 318 0 ioctlops 0 0K 4K 166960K 1892 0 iov 0 0K 16K 166960K 140 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1428 90K 90K 166960K 2846 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 31 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 50 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 13 45K 244K 166960K 1840 0 sigio 0 0K 0K 166960K 29 0 proc 72 115K 180K 166960K 1556 0 subproc 72 4K 4K 166960K 378 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 172 0 in_multi 79 5K 7K 166960K 488 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 1085 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 212 175K 190K 166960K 16260 0 UVM aobj 85 5K 5K 166960K 93 0 pinsyscall 38 76K 104K 166960K 3797 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 59 0 NDP 11 0K 1K 166960K 182 0 temp 78 8652K 8894K 166960K 79832 0 kqueue 13 20K 33K 166960K 275 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 202 0 199 1 0 1 1 0 8 0 rtentry 176 619 0 542 5 0 5 5 0 8 0 unpcb 144 743 0 726 6 5 1 4 0 8 0 syncache 336 12 0 12 5 4 1 1 0 8 1 tcpqe 32 3 0 3 3 2 1 1 0 8 1 tcpcb 736 445 0 438 16 15 1 7 0 8 0 arp 136 116 0 105 1 0 1 1 0 8 0 inpcb 328 1776 0 1766 33 30 3 12 0 8 1 nd6 144 86 0 71 1 0 1 1 0 8 0 pkpcb 40 8 0 8 4 4 0 1 0 8 0 kcovpl 48 42 0 34 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 79 0 79 5 4 1 1 0 8 1 pppxif 1504 6 0 6 2 2 0 1 0 8 0 pffrag 232 11 0 8 1 0 1 1 0 482 0 pffrnode 88 9 0 6 1 0 1 1 0 8 0 pffrent 40 26 0 23 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 10 0 10 3 3 0 1 0 8 0 pfanchor 1288 3 0 3 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 87 0 51 1 0 1 1 0 8 0 pfstkey 128 89 0 53 2 0 2 2 0 8 0 pfstate 384 88 0 52 5 0 5 5 0 8 0 pfrule 1344 34 0 29 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 2127 0 1778 36 11 25 29 0 8 0 art_table 40 2130 0 1778 5 0 5 5 0 8 0 art_node 32 616 0 552 3 0 3 3 0 8 0 sysvmsgpl 40 11 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 45 0 35 1 0 1 1 0 8 0 shmpl 112 90 0 8 3 0 3 3 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 4081 0 2514 98 0 98 98 0 8 0 ffsino 296 4081 0 2514 121 0 121 121 0 8 0 nchpl 144 5947 0 4130 68 0 68 68 0 8 0 rtmask 32 24 0 24 5 4 1 1 0 8 1 uvmvnodes 80 4993 0 0 102 0 102 102 0 8 0 vnodes 216 4993 0 0 278 0 278 278 0 8 0 namei 1024 24046 0 24046 4 3 1 2 0 8 1 percpumem 16 174 0 126 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 202 0 178 5 3 2 3 0 8 0 scsiplug 72 10 0 10 5 5 0 1 0 8 0 scxspl 216 36470 0 36469 12 11 1 8 1 8 0 plimitpl 152 426 0 408 1 0 1 1 0 8 0 sigapl 424 2044 0 1999 7 1 6 7 0 8 0 knotepl 120 570 0 0 18 1 17 17 0 8 0 kqueuepl 224 661 0 652 14 11 3 5 0 8 2 pipepl 344 318 0 290 3 0 3 3 0 8 0 fdescpl 528 2025 0 1998 3 0 3 3 0 8 0 filepl 160 12099 0 11884 26 14 12 19 0 8 0 lockfpl 104 742 0 740 3 2 1 2 0 8 0 lockfspl 48 215 0 213 1 0 1 1 0 8 0 sessionpl 144 66 0 57 1 0 1 1 0 8 0 pgrppl 48 118 0 101 1 0 1 1 0 8 0 ucredpl 104 2005 0 1992 1 0 1 1 0 8 0 zombiepl 144 2401 0 2398 1 0 1 1 0 8 0 processpl 1232 2044 0 1999 5 1 4 5 0 8 0 procpl 664 4190 0 4143 8 2 6 7 0 8 0 sosppl 168 12 0 12 4 3 1 1 0 8 1 sockpl 752 2756 0 2726 39 33 6 17 0 8 2 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 63 0 0 7 0 7 7 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 322 0 0 18 0 18 18 0 8 0 bufpl 280 14824 0 8680 440 0 440 440 0 8 0 anonpl 32 15043 0 0 122 0 122 122 0 246 0 amapchunkpl 152 54031 0 53579 52 23 29 33 0 158 3 amappl16 200 6578 0 6471 51 33 18 31 0 8 4 amappl15 192 7 0 7 2 2 0 1 0 8 0 amappl14 184 199 0 186 1 0 1 1 0 8 0 amappl13 176 11 0 10 1 0 1 1 0 8 0 amappl12 168 3214 0 3187 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 46 0 46 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 38 0 35 1 0 1 1 0 8 0 amappl7 128 184 0 171 1 0 1 1 0 8 0 amappl6 120 589 0 585 1 0 1 1 0 8 0 amappl5 112 324 0 314 1 0 1 1 0 8 0 amappl4 104 372 0 350 1 0 1 1 0 8 0 amappl3 96 9379 0 9307 4 0 4 4 0 8 0 amappl2 88 2397 0 2322 2 0 2 2 0 8 0 amappl1 80 19652 0 19066 15 0 15 15 0 8 0 amappl 88 14816 0 14679 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 257 0 257 5 5 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 92 0 8 2 0 2 2 0 8 0 uaddrrnd 24 2025 0 1998 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2025 0 1998 1 0 1 1 0 8 0 vmmpekpl 168 17329 0 17275 3 0 3 3 0 8 0 vmmpepl 168 138614 0 136775 123 22 101 113 0 357 1 vmsppl 488 2024 0 1997 6 1 5 5 0 8 0 rwobjpl 80 43816 0 37751 131 2 129 129 0 8 0 pdppl 4096 4058 0 3994 150 78 72 84 0 8 8 pvpl 32 22038 0 0 179 1 178 178 0 265 0 pmappl 256 2024 0 1997 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 368 0 116 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837adff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff838a6868) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80002a281790,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80002a281790,ffff80003c458ba0,ffff80003c458af0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c458ba0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c458ba0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c7a8ff15f90, count: 7 ddb{0}> trace x86_ipi_db(ffffffff837adff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff838a6868) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80002a281790,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80002a281790,ffff80003c458ba0,ffff80003c458af0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c458ba0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c458ba0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c7a8ff15f90, count: -8 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79bb508513b0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79bb508513b0, count: -1